CH672588A5 - - Google Patents

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Publication number
CH672588A5
CH672588A5 CH260587A CH260587A CH672588A5 CH 672588 A5 CH672588 A5 CH 672588A5 CH 260587 A CH260587 A CH 260587A CH 260587 A CH260587 A CH 260587A CH 672588 A5 CH672588 A5 CH 672588A5
Authority
CH
Switzerland
Prior art keywords
prosthesis
body
disc
vertebrae
characterized
Prior art date
Application number
CH260587A
Other languages
German (de)
Inventor
Otto Frey
Rudolf Koch
Original Assignee
Sulzer Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer Ag filed Critical Sulzer Ag
Priority to CH260587A priority Critical patent/CH672588A5/de
Priority claimed from AT88108214T external-priority patent/AT70710T/en
Publication of CH672588A5 publication Critical patent/CH672588A5/de

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/3011Cross-sections or two-dimensional shapes
    • A61F2002/30112Rounded shapes, e.g. with rounded corners
    • A61F2002/30133Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30576Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30772Apertures or holes, e.g. of circular cross section
    • A61F2002/30784Plurality of holes
    • A61F2002/30785Plurality of holes parallel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30772Apertures or holes, e.g. of circular cross section
    • A61F2002/30784Plurality of holes
    • A61F2002/30787Plurality of holes inclined obliquely with respect to each other
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30907Nets or sleeves applied to surface of prostheses or in cement
    • A61F2002/30909Nets
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0015Kidney-shaped, e.g. bean-shaped
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00Surgery
    • Y10S606/907Composed of particular material or coated

Description

672 588 672588

2 2

Claims (7)

PATENTANSPRÜCHE
1. Metallische Zwischenwirbel-Prothese für eine Arthrodese, dadurch gekennzeichnet, dass sie aus einem scheibenartigen Prothesenkörper (1) besteht, an dessem ventral gelegenen Rand (3) mit Durchtrittsöffnungen (5) für Knochenschrauben versehene Laschen (4) angesetzt sind. 1. Metallic intervertebral prosthesis for an arthrodesis, characterized in that it consists of a disk-like prosthesis body (1), at whose ventral edge (3) with through openings (5) provided for bone screws tabs (4) are attached.
2. Zwischenwirbel-Prothese nach Anspruch 1, dadurch gekennzeichnet, dass sich die Dicke des Prothesenkörpers (1) von ventral nach dorsal konisch verjüngt. 2. A prosthesis according to claim 1, characterized in that the thickness of the prosthesis body (1) tapers conically from ventral to dorsal.
3. Zwischenwirbel-Prothese nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Prothesenkörper (1) nieren-förmig ausgebildet ist. 3. A prosthesis according to claim 1 or 2, characterized in that the prosthesis body (1) is kidney-shaped.
4. Zwischenwirbel-Prothese nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass die Scheibenoberflächen des Prothesenkörpers (1) mit einer Struktur (2) für das Ein- und/oder Anwachsen von Gewebe versehen sind. 4. A prosthesis according to any one of claims 2 and 3, characterized in that the disc surfaces of the prosthesis body (1) having a structure (2) for the input and / or growth of tissue are provided.
5. Zwischenwirbel-Prothese nach Anspruch 4, dadurch gekennzeichnet, dass die Struktur (2) aus einem mindestens einlagigen Netz aus Metalldraht besteht. 5. A prosthesis according to claim 4, characterized in that the structure (2) of an at least single-layer web is made of metal wire.
6. Zwischenwirbel-Prothese nach Anspruch 1, dadurch gekennzeichnet, dass auf den Scheibenoberflächen des Prothesenkörpers (1) wulstartige Erhebungen (7) vorgesehen sind. 6. A prosthesis according to claim 1, characterized in that the disc surfaces of the prosthesis body (1) bead-like protrusions (7) are provided.
7. Zwischenwirbel-Prothese nach Anspruch 6, dadurch gekennzeichnet, dass die wulstartigen Erhebungen (7) einen spitzen Winkel einschliessende Zylindersegmente sind. 7. A prosthesis according to claim 6, characterized in that the bead-like elevations (7) enclosing an acute angle cylinder segments.
BESCHREIBUNG DESCRIPTION
Die Erfindung betrifft eine metallische Zwischenwirbel-Prothese für eine Arthrodese. The invention relates to a metallic intervertebral prosthesis for an arthrodesis.
Für eine Versteifung (Arthrodese) zweier Lendenwirbel relativ zueinander sind bisher zwei unterschiedliche Vorgehensweisen üblich. Two different approaches are common relative to each other so far for a stiffener (arthrodesis) of two lumbar vertebrae. Bei dem einen Verfahren werden an anderen Stellen des Körpers, beispielsweise aus dem Becken oder dem Wadenbein, entnommene Knochensplitter als teilweiser Ersatz für die beschädigten Bandscheiben zwischen zwei Wirbeln von ventral her eingesetzt und mit Hilfe von Knochenschrauben fixiert. In one method, be used as a partial replacement for the damaged spinal disc between two vertebrae of ventral forth and fixed by means of bone screws to other parts of the body, for example of the basin or the fibula, harvested bone splinters. Es hat sich gezeigt, dass — vor allem kurz nach der Implantation, wenn das Knochengewebe nocht nicht mit den Wirbelkörpern verwachsen ist — die Fixierung der beiden angrenzenden Wirbel ungenügend ist und keine ausreichende Stabilität besitzt. It has been shown that - especially just after implantation, when bone tissue is Nocht not fused with the vertebrae - the fixing of the two adjacent vertebrae is insufficient and does not have sufficient stability.
Bei dem anderen Verfahren werden zwei benachbarte Wirbel durch kreuzförmige Platten, die von dorsal her mit den beiden Wirbelkörpern, beispielsweise ebenfalls durch Schrauben, fest verbunden werden, relativ zueinander fixiert. In the other method, two adjacent vertebrae by cross-shaped plates which are fixedly connected dorsal forth with the two vertebral bodies, for example likewise by screws, fixed relative to each other. Auch hier hat die Praxis gezeigt, dass die relativ weit von den Bandscheiben entfernt angeordneten Kreuzplatten im dorsalen Bereich der Wirbel — besonders bei grösseren Bandscheibenschäden oder bei einem kompletten Ersatz einer Bandscheibe — im Bereich der Bandscheiben nur eine ungenügende Fixierung der Wirbel bewirken und ebenfalls zu Instabilitäten in der gegenseitigen Versteifung der Wirbel neigen. Again, the practice has shown that the relatively far remote from the discs cross plates in the dorsal region of the vertebrae - especially with larger disc disease or a complete replacement of an intervertebral disc - in the field of spinal discs only cause insufficient fixation of the vertebrae and also to instability tend in the mutual stiffening of the vertebra.
Aufgabe der Erfindung ist es daher, eine mit relativ geringem operativen Abstand implantierbare und fixierbare Zwischenwirbelprothese zu schaffen, mit der als Bandscheibenersatz feste und stabile Versteifung zweier Wirbel erreicht wird. The object of the invention is therefore to provide a relatively low operating distance implantable and fixable intervertebral prosthesis is achieved with the intervertebral disc replacement firm and stable stiffening of two vertebrae. Mit der vorhegenden Erfindung wird dieses Ziel dadurch erreicht, dass sie aus einem scheibenartigen Prothesenkörper besteht, an dessem ventral gelegenen Rand mit Durchtrittsöffnungen für Knochenschrauben versehene Laschen angesetzt sind. With the vorhegenden invention this object is achieved in that it consists of a disk-like prosthesis body, provided at whose ventral edge with through openings for bone screws tabs are attached.
Die neue Prothese zeichnet sich durch grosse Einfachheit aus, da sie lediglich aus einer die Bandscheibe ersetzenden Platte besteht. The new prosthesis is characterized by great simplicity, since it consists solely of a the disc replaced disk. Ihre Primärfixierung erfolgt mit Knochenschrauben, die von ventral in die Wirbelkörper eingeschraubt werden, nachdem der Prothesenkörper ebenfalls von ventral in den zuvor von der zerstörten Bandscheibe geräumten Zwischenraum zwischen den Wirbeln eingeschoben worden ist. Their primary fixing is carried out with bone screws, which are screwed from the ventral to the vertebral body, after the prosthesis body has also been inserted from the anterior side in the previously vacated by the damaged disc space between the vertebrae.
Für die Anpassung der Prothese an die anatomischen Gegebenheiten ist es vorteilhaft, wenn sich die Dicke des Prothesenkörpers von ventral nach dorsal konisch verjüngt und/oder wenn der Prothesenkörper nierenförmig ausgebildet ist. For the adaptation of the prosthesis to the anatomical conditions, it is advantageous if the thickness of the prosthesis body narrows conically ventrally to dorsally and / or when the prosthesis body is kidney-shaped.
Für die Langzeitfixierung ist es vorteilhaft, wenn die Scheibenoberflächen des Prothesenkörpers mit einer Struktur für das Ein- und/oder Anwachsen von Gewebe versehen sind. For long term fixation, it is advantageous if the disc surfaces of the prosthesis body are provided with a structure for the input and / or growth of tissues. Insbesondere hat sich dabei als Struktur ein mindestens einlagiges Netz aus Metalldraht bewährt, das beispielsweise durch über die Fläche verteilte Punktschweissungen auf den Scheibenoberflächen des Prothesenkörpers gehalten ist. In particular, an at least single-layer mesh of metal wire has proven itself as a structure which is supported for example by distributed over the surface point weldings on the disc surfaces of the prosthesis body.
Zur Erhöhung der Querstabilität der Prothese können auf den Scheibenoberflächen des Prothesenkörpers wulstartige Erhebungen vorgesehen sein. To increase the lateral stability of the prosthesis bead-like protrusions may be provided on the wafer surfaces of the prosthesis body. Diese können beispielsweise die Form von einen spitzen Winkel einschliessenden Zylindersegmenten haben. This may have enclosing cylinder segments, for example in the form of an acute angle.
Geeignete Werkstoffe für die Herstellung der neuen Prothese sind die in der Implantat-Technik verwendeten Metalle und Metall-Legierungen; Suitable materials for the preparation of the new prosthesis and the metals used in the implant art metal alloys; bevorzugt werden Titan und Titan-Legierungen. are preferably titanium and titanium alloys.
Im folgenden wird die Erfindung anhand von Ausführungsbeispielen im Zusammenhang mit der Zeichnung näher erläutert. In the following the invention is explained in detail by means of exemplary embodiments in conjunction with the drawings.
Fig. 1 ist eine Aufsicht auf einen ersten Prothesenkörper; Fig. 1 is a plan view of a first prosthetic body;
Fig. 2 stellt eine Ansicht von Fig. 1 von links dar; Fig. 2 represents a view of Figure 1 from the left.
Fig. 3 ist eine Ansicht eines eingesetzten Implantates von ventral; Fig. 3 is a view of an implant of ventral employed;
Fig. 4 gibt in gleicher Darstellung wie Fig. 1 eine zweite Ausführungsform der Erfindung wieder, während Fig. 4 shows in the same representation as Fig. 1 shows a second embodiment of the invention, again, while
Fig. 5 der Schnitt V—V von Fig. 4 ist. Fig. 5 is the section V-V of Fig. 4.
Der scheibenartige Prothesenkörper 1, der ventral konvex und dorsal konkav gekrümmt ist, hat eine von ventral nach dorsal abnehmende Dicke (Fig. 2). The disk-like prosthesis body 1, which is anterior convexly curved and dorsal concave, has an anterior to posterior decreasing thickness (Fig. 2). Er ist auf seinen Scheibenoberflächen mit einer Struktur 2 versehen, die im vorliegenden Beispiel aus einem einlagigen Drahtnetz besteht; It is provided at its disc surface with a structure 2, which consists of a single-layer wire mesh in the present example; dieses ist durch über die nierenförmige Scheibenoberfläche verteilte Punktschweissung befestigt. this is fixed by the kidney shaped disc surface distributed spot welding.
Am konvex gekrümmten ventral gelegenen Rand 3 des Prothesenkörpers 1 sind symmetrisch zu seiner Mittelebene aus der Scheibenfläche nach oben und unten hervorstehende Laschen 4 angesetzt, die je eine Bohrung 5 für den Durchtritt einer nicht gezeigten Knochenschraube haben. On convexly curved ventral edge 3 of the prosthesis body 1 are set symmetrically to its center plane of the disk facing upwards and protruding bottom plates 4, each having a hole 5 for the passage of a bone screw not shown. Die Bohrungen 5 sind als Teile einer Kugelschale ausgeführt, um eine Ausrichtung der Schrauben in eine Linie zu erleichtern. The holes 5 are designed as parts of a spherical shell in order to facilitate alignment of the screws in a line.
Um die Querstabilität der Versteifung zu erhöhen, ist bei dem Ausführungsbeispiel nach Fig. 4, das im sonstigen Aufbau demjenigen nach Fig.l — 3 entspricht, auf jeder Scheibenoberfläche des Prothesenkörpers 1 eine wulstartige Erhebung 7 vorgesehen. Provided on each disc surface of the prosthesis body 1 is a bead-like elevation 7 3 corresponds - to increase the transverse stability of the reinforcement is in the embodiment of Figure 4, that in the other assembly according to Fig.l.. Die Erhebung 7 hat die Form von in einem spitzen — im vorliegenden Fall rechten — Winkel zueinander verlaufenden Zylindersegmenten. The projection 7 has the shape of an acute - angle to each other extending cylinder segments - right in this case.
Wie in Fig. 3 angedeutet, schmiegen sich die Laschen 4 weitgehend an die Wirbelkörper 6 an, in die zur Primärfixierung der Prothese Knochenschrauben eingeschraubt werden. As indicated in Fig. 3, the tabs nestle 4 largely to the vertebral body 6 to be screwed into the primary fixation of the prosthesis to bone screws.
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1 Blatt Zeichnungen 1 sheet of drawings
CH260587A 1987-07-09 1987-07-09 CH672588A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH260587A CH672588A5 (en) 1987-07-09 1987-07-09

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH260587A CH672588A5 (en) 1987-07-09 1987-07-09
DE19883867154 DE3867154D1 (en) 1987-07-09 1988-05-21 Metallic intervertebral-prosthesis.
EP19880108214 EP0298233B1 (en) 1987-07-09 1988-05-21 Metallic spinal disc prosthesis
AT88108214T AT70710T (en) 1987-07-09 1988-05-21 Metallic intervertebral-prosthesis.
US07/203,950 US4955908A (en) 1987-07-09 1988-06-08 Metallic intervertebral prosthesis

Publications (1)

Publication Number Publication Date
CH672588A5 true CH672588A5 (en) 1989-12-15

Family

ID=4237520

Family Applications (1)

Application Number Title Priority Date Filing Date
CH260587A CH672588A5 (en) 1987-07-09 1987-07-09

Country Status (4)

Country Link
US (1) US4955908A (en)
EP (1) EP0298233B1 (en)
CH (1) CH672588A5 (en)
DE (1) DE3867154D1 (en)

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EP0298233B1 (en) 1991-12-27
EP0298233A1 (en) 1989-01-11
DE3867154D1 (en) 1992-02-06
US4955908A (en) 1990-09-11

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